Ball bearing internal grinding machine

Abstract

The utility model provides a ball bearing internal grinding machine, which relates to the technical field of grinding machines, and comprises a grinding machine frame and a driving device, the output end of the driving device is connected with a mounting seat, a grinding rod is detachably mounted on the mounting seat, a locking hole penetrating through groove is formed in the side wall of a placing groove, a penetrating sliding hole is formed in the mounting seat, and the grinding rod is detachably mounted on the mounting seat. A sliding rod assembly is slidably mounted in the penetrating sliding hole and comprises a middle beam guide rod, a first positioning sleeve and a second positioning sleeve, two semicircular hoops are pivoted to the outer wall of the mounting base, push rod grooves are symmetrically formed in one ends of the semicircular hoops, and push rod pin shafts are arranged in the push rod grooves; a T-shaped block is installed between the push rod pin shafts in a sliding mode, an arc-shaped sliding groove is formed in the T-shaped block, the push rod pin shafts are arranged in the arc-shaped sliding groove in a sliding and penetrating mode, and the other end of the T-shaped block is connected to one end of the middle beam guide rod in a pivoted mode. According to the utility model, the grinding rod can be quickly disassembled and assembled by opening and closing the semicircular hoops.

Description

Technical Field

[0001] This utility model relates to the field of grinding technology, specifically to a ball bearing internal grinding machine. Background Technology

[0002] A ball bearing internal grinding machine is a precision grinding device specifically designed for machining the inner ring of ball bearings. It primarily ensures key parameters such as dimensional accuracy, roundness, and surface roughness of the bearing's inner diameter. During prolonged grinding of the bearing's inner circle, the grinding head often suffers damage, requiring disassembly and replacement. Currently, the market typically uses ER series spring collets, which achieve fast and precise clamping and releasing through the elastic deformation of the collet body and the conical surface fit. However, prolonged use can lead to elastic fatigue, resulting in insufficient clamping force in the circumferential direction, causing the grinding head to slip during grinding and affecting grinding accuracy. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a ball bearing internal grinding machine, which solves the problems mentioned in the background art.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A ball bearing internal grinding machine includes a grinding machine frame and a drive device mounted on the grinding machine frame. The output end of the drive device is connected to a mounting base. A grinding rod is detachably mounted on the mounting base. A grinding head is fixed to the front end of the grinding rod. A placement groove is formed at the rear end of the grinding rod. A locking hole and a through groove communicating with the locking hole are formed on the side wall of the placement groove. A through sliding hole is formed in the mounting base. A slide rod assembly is slidably installed in the through sliding hole. The slide rod assembly includes a center beam guide rod, a positioning sleeve one, and a positioning sleeve two. The positioning sleeve one and the positioning sleeve two are sleeved on the outer wall of the center beam guide rod. The positioning sleeve one and the positioning sleeve two are slidably installed in the through sliding hole. The outer diameter of the center beam guide rod is smaller than the width of the through groove. The outer diameter of the positioning sleeve one and the positioning sleeve two is equal to the outer diameter of the locking hole.

[0008] Preferably, a locking ring groove is provided on the outer wall of the mounting base, and two symmetrically arranged semi-circular clamps are pivotally connected to the side wall of the locking ring groove. One end of the two semi-circular clamps is provided with a symmetrically arranged push rod groove, and a push rod pin is provided in the push rod groove. A T-shaped block is slidably installed between the two push rod pins. Arc-shaped grooves are symmetrically arranged on the left and right sides of the T-shaped block, and the push rod pin slides through the arc-shaped groove. The other end of the T-shaped block is pivotally connected to one end of the middle beam guide rod.

[0009] Preferably, the end of the central beam guide rod facing the T-shaped block is rotatably connected to a pivot seat, a flat push rod is fixed on the pivot seat, and the T-shaped block is pivotally connected to the flat push rod.

[0010] Preferably, the positioning sleeve includes an integrally formed nut ring, a connecting rod, and a locking ring. The nut ring and the locking ring are both sleeved on the middle beam guide rod. The connecting rod is connected between the nut ring and the locking ring and is disposed in a through groove. A guide block is provided on the outer wall of the nut ring. An axial groove is formed on the inner wall of the through sliding hole to slide and engage with the guide block. An external thread is formed on the outer wall of the middle beam guide rod. The nut ring is threadedly sleeved on the middle beam guide rod, and the locking ring is slidably sleeved on the middle beam guide rod.

[0011] Preferably, the end of the middle beam guide rod away from the pivot seat is provided with a screwing block that slides and engages with the through sliding hole, and the outer end of the screwing block is provided with a cross groove.

[0012] Preferably, a bent piece is provided at the end of the semi-circular clamp away from the push rod groove. A locking hole is provided on the bent piece, and a locking bolt is connected in the locking hole. The locking bolt passes through the locking hole of another bent piece, and a locking nut is threaded onto the locking bolt.

[0013] (III) Beneficial Effects

[0014] This utility model provides a ball bearing internal grinding machine. It has the following beneficial effects:

[0015] 1. In this utility model, the grinding rod is inserted into the mounting base, and a through groove is provided to pass through the middle beam guide rod, so that the locking hole is aligned with the through sliding hole. The semi-circular clamp can be fastened by pushing and pulling the middle beam guide rod through the T-trapezoidal block, which can make the positioning sleeve one and positioning sleeve two on the middle beam guide rod slide left and right. In this way, the positioning sleeve one and positioning sleeve two can be slidably inserted into the locking hole to form a snap-lock, thus completing the quick installation of the grinding rod.

[0016] 2. In this utility model, opening the semi-circular clamp exposes the screwing block inside the through-hole. The screwing cross groove can adjust the left and right positions of the nut ring through the threaded engagement, which can adjust the distance between the locking ring and the inner wall of the placement groove, and can meet the locking requirements of different thickness placement grooves. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the mounting base of this utility model;

[0018] Figure 2 This is a cross-sectional view of the mounting base in this utility model. Figure 1 ;

[0019] Figure 3 This is a cross-sectional view of the mounting base in this utility model. Figure 2 .

[0020] In the diagram: 1. Mounting base; 2. Through-hole; 3. Grinding rod; 4. Locking hole; 5. Through-slot; 6. Center beam guide rod; 7. Positioning sleeve one; 71. Nut ring; 72. Connecting rod; 73. Locking ring; 8. Positioning sleeve two; 9. Semi-circular clamp; 10. Push rod pin; 11. T-block; 12. Arc-shaped slide groove; 13. Pivot seat; 14. Tightening block; 15. Flat push rod; 16. Bending piece; 17. Locking bolt; 18. Locking nut. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model embodiment provides a ball bearing internal grinding machine, such as Figure 1-3 As shown, the device includes a grinding machine frame and a drive unit mounted on the grinding machine frame. The output end of the drive unit is connected to a mounting base 1. A locking ring groove is formed on the outer wall of the mounting base 1, and a through sliding hole 2 is formed on the inner wall of the locking ring groove. A mounting hole for inserting a grinding rod 3 is formed in the middle of the mounting base 1. The grinding rod 3 is detachably mounted in the mounting hole. A grinding head is fixed to the front end of the grinding rod 3. A vertical groove is formed on the outer wall of the grinding rod 3, and an inner protrusion is provided on the inner wall of the mounting hole. The inner protrusion slides and engages with the vertical groove. The grinding rod 3 has an abutment ring in the middle, which abuts against the lower side of the mounting base 1, allowing the grinding rod 3 to be oriented and inserted into the mounting base 1. The rear end of the grinding rod 3 has a placement groove, and the side wall of the placement groove has a locking hole 4 and a through groove 5 communicating with the locking hole 4. The inner diameter of the locking hole 4 is larger than the width of the through groove 5. Under the guidance of the inner protrusion, when the grinding rod 3 is installed inside the mounting base 1, the locking hole 4 can be aligned with the through sliding hole 2.

[0023] A sliding rod assembly is slidably installed within the through-hole 2. The sliding rod assembly includes a center beam guide rod 6, a first positioning sleeve 7, and a second positioning sleeve 8. The first positioning sleeve 7 includes an integrally formed nut ring 71, a connecting rod 72, and a locking ring 73. The outer wall of the center beam guide rod 6 has external threads. The nut ring 71 is threadedly fitted onto the center beam guide rod 6. The locking ring 73 is slidably fitted onto the center beam guide rod 6. The connecting rod 72 connects the nut ring 71 and the locking ring 73. A guide block 1 is provided on the outer wall of the nut ring 71. An axial groove that slides and engages with the guide block 1 is provided on the inner wall of the through-hole 2. The connecting rod 72 is disposed within the through-groove 5. The nut ring 71 can only slide left and right within the through-hole 2 due to the limitation of the guide block 1. Since it cannot rotate in a circular motion, the locking ring 73 can slide left and right and adjust its position on the middle beam guide rod 6 by means of the threaded engagement nut ring 71 during the rotation of the middle beam guide rod 6. A through gap 1 is provided between the nut ring 71 and the locking ring 73, and the through gap 1 is greater than the thickness of the outer wall of the placement groove. The positioning sleeve 2 8 is a cylindrical structure and is fixed on the middle beam guide rod 6. A through gap 2 is provided between the positioning sleeve 2 8 and the locking ring 73, and the through gap 2 is greater than the thickness of the outer wall of the placement groove. During the left and right sliding of the middle beam guide rod 6, the positioning sleeve 2 8 can move in and out of the through sliding hole 2. When the grinding rod 3 is installed, the positioning sleeve 2 8 is completely hidden inside the through sliding hole 2. In the locked state, the positioning sleeve 2 8 slides out of the through sliding hole 2 and inserts into the locking hole 4.

[0024] The outer diameter of the central beam guide rod 6 is smaller than the width of the through groove 5. The outer diameters of the positioning sleeve 1 7 and positioning sleeve 2 8 are equal to the outer diameter of the locking hole 4. When installing the grinding rod 3, the through groove 5 can smoothly pass through the through gap 1 and through gap 2, so that the locking hole 4 is aligned with the through sliding hole 2. Sliding the central beam guide rod 6 left and right can slide the locking ring 73 and positioning sleeve 2 8 into the locking hole 4. The locking ring 73 and positioning sleeve 2 8 are locked in the locking hole 4 and cannot be drawn out from the through groove 5. The grinding rod 3 is locked in the radial and circumferential directions. That is, sliding the central beam guide rod 6 left and right can realize the locking and unlocking of the grinding rod 3.

[0025] Two symmetrically arranged semi-circular clamps 9 are pivotally connected to the side wall of the locking ring groove. The end of the semi-circular clamp 9 is provided with a pivot hole. The upper and lower side walls of the locking ring groove are fixed with clamp pins. The pivot hole and the clamp pin are rotatably engaged. The end of the semi-circular clamp 9 near the pivot hole is provided with a symmetrically arranged push rod groove. The push rod groove is provided with a push rod pin 10. A push rod gap is formed between the push rod pin 10 and the clamp pin. That is, when the semi-circular clamp 9 is rotated, the push rod pin 10 rotates eccentrically around the clamp pin.

[0026] A T-shaped block 11 is slidably installed between the two push rod pins 10. The T-shaped block 11 includes two integrally formed horizontal parts and a push rod part vertically arranged between the two horizontal parts. The two horizontal parts are provided with symmetrically arranged arc-shaped grooves 12. The push rod pins 10 slide through the arc-shaped grooves 12. The end of the middle beam guide rod 6 facing the T-shaped block 11 is rotatably connected to a pivot seat 13. Two parallel pivot plates are fixed on the pivot seat 13. A pivot gap is provided between the two pivot plates. A flat push rod 15 is fixed between the two pivot plates. The push rod part is pivotally connected to the flat push rod 15.

[0027] The end of the middle beam guide rod 6 away from the pivot seat 13 is provided with a screwing block 14 that slides and engages with the through sliding hole 2. The outer end of the screwing block 14 is provided with a cross groove. In the above technical solution, the pivot seat 13 is limited by the flat push rod 15, so that the pivot seat 13 can only slide left and right in the through sliding hole 2, and cannot rotate the rod circumferentially. That is, rotating the cross groove can realize the rotation of the middle beam guide rod 6 on the pivot seat 13. In this way, the left and right positions of the locking ring 73 can be adjusted by rotating the beam guide rod, which can prevent the locking ring 73 from getting stuck on the upper end of the grinding rod 3 when installing the grinding rod 3.

[0028] A bent piece 16 is provided at the end of the semicircular clamp 9 away from the push rod groove. A locking hole is provided on the bent piece 16. A locking bolt 17 is connected in the locking hole. The locking bolt 17 passes through the locking hole of another bent piece 16. A locking nut 18 is threaded on the locking bolt 17. The two semicircular clamps 9 can be fixed on the locking ring groove by the locking bolt 17 and the locking nut 18, thus locking and unlocking the semicircular clamps 9.

[0029] Working principle:

[0030] In this invention, when the grinding rod 3 needs to be replaced, the locking nut 18 can be rotated to unlock the semi-circular clamp 9. The semi-circular clamp 9 is rotated open around the clamp pin, and the push rod pin 10 rotates eccentrically around the axis of the clamp pin. At this time, the T-block 11 slides outward, thereby allowing the middle beam guide rod 6 to slide toward one side of the T-block 11. The locking ring 73 moves into the placement groove, and the positioning sleeve 2 moves into the through sliding hole 2, disengaging from the locking hole 4. At this time, the grinding rod 3 is in the unlocked state and can be easily removed. Similarly, by fastening the semi-circular clamp 9, the locking ring 73 and the positioning sleeve 2 slide and insert into the locking hole 4 to form a lock, thus completing the installation of the grinding rod 3. Through the above technical solution, the installation and removal of the grinding rod 3 can be achieved by opening and closing the semi-circular clamp 9.

[0031] In addition, rotating the cross groove can rotate the middle beam guide rod 6, which can adjust the left and right position of the locking ring 73, thereby adjusting the distance between the locking ring 73 and the inner wall of the placement groove. This facilitates the installation of grinding rods 3 with side walls of different thicknesses in the placement groove, and prevents the locking ring 73 from getting stuck on the upper end of the grinding rod 3 and preventing it from being installed.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ball bearing inner race grinder comprising a grinder frame and drive means mounted on the grinder frame, characterised in that: The output end of the driving device is connected with a mounting seat, a grinding rod is detachably mounted on the mounting seat, a grinding head is fixed to the front end of the grinding rod, a placing groove is formed in the rear end of the grinding rod, a locking hole and a through groove communicated with the locking hole are formed in the side wall of the placing groove, a through sliding hole is formed in the mounting seat, a sliding rod assembly is slidably mounted in the through sliding hole, the sliding rod assembly comprises a middle beam guide rod, a positioning sleeve one and a positioning sleeve two, the positioning sleeve one and the positioning sleeve two are sleeved on the outer wall of the middle beam guide rod, the positioning sleeve one and the positioning sleeve two are slidably mounted in the through sliding hole, the outer diameter of the middle beam guide rod is smaller than the width of the through groove, the outer diameters of the positioning sleeve one and the positioning sleeve two are equal to the outer diameter of the locking hole, the positioning sleeve one is arranged in the placing groove, and the positioning sleeve two is arranged in the through sliding hole.

2. A ball bearing inner race grinder according to claim 1, wherein: A locking ring groove is formed in the outer wall of the mounting seat, two symmetrical half-circle clamps are pivotally connected to the side wall of the locking ring groove, a push rod groove is formed in one end of the two half-circle clamps, a push rod pin is arranged in the push rod groove, a T-shaped block is slidably mounted between the two push rod pins, arc-shaped sliding grooves are symmetrically arranged on the left and right sides of the T-shaped block, the push rod pins are slidably arranged in the arc-shaped sliding grooves, and the other end of the T-shaped block is pivotally connected to one end of the middle beam guide rod.

3. A ball bearing inner race grinder according to claim 2, wherein: A pivot seat is rotationally connected to one end of the middle beam guide rod, a flat push pin is fixed to the pivot seat.

4. A ball bearing inner race grinder according to claim 3, wherein: The positioning sleeve one comprises an integrally formed nut ring, a connecting rod and a locking ring, the nut ring and the locking ring are sleeved on the middle beam guide rod, the connecting rod is connected between the nut ring and the locking ring, the connecting rod is arranged in the through groove, a guide block one is arranged on the outer wall of the nut ring, an axial groove slidably matched with the guide block one is formed in the inner wall of the through sliding hole, an external thread is formed in the outer wall of the middle beam guide rod, the nut ring is threadedly connected to the middle beam guide rod in a sleeved mode, and the locking ring is slidably sleeved on the middle beam guide rod.

5. A ball bearing inner race grinder according to claim 4 wherein: A screwing block slidably matched with the through sliding hole is arranged at the end of the middle beam guide rod away from the pivot seat, and a cross groove is formed in the outer end of the screwing block.

6. A ball bearing inner race grinder according to claim 5 wherein: A bending piece is arranged at the end of the half-circle clamp away from the push rod groove, a locking hole is formed in the bending piece, a locking bolt is connected in the locking hole, the locking bolt penetrates through the locking hole of the other bending piece, and a locking nut is threadedly connected to the locking bolt.

Images